At the top of the broadcast we showed you stories from that crash landing in is to. Every story of survival, a lesson in plane safety. David kerley now with simple things on a plane that we can all do. Reporter: Tests like these -- jets intentionally crashed. This one filmed by the discovery channel, as well as actual deadly accidents, have brought change to almost everything in the cabin. Airline seats used to crumple in a crash. These are the new seats. BUILT TO WITHSTAND 16 Gs, 16 times the force of gravity. The fabrics on those seats and many of the materials in the cabin are less flammable. Giving passengers a few more precious seconds to escape. But experts say there is more we can do. Adding airbags. Many airlines have already installed them in business and first class but in economy? Bracing is still one of the best ways to avoid injury. The back of that seat in front of you has padding. But there is a worry if airlines stuff in too many seats it's impossible to brace. And as we saw in this crash, many of those seat backs have tv screens. Approved by the faa, but a worry to some. These little scres up there and you don't want to have to walk away from an otherwise survivable accident with an imprint of that on your head. Reporter: Some of the serious injuries in san francisco were to passenger's stomachs. That may be because passengers were wearing their seatbelt up here on the abdomen. It needs to be low. Down on your hip bones to avoid stomach injuries. Reporter: Now you survived the crash. How do you get out? Plane makers have to prove their jets can be completely evacuated in 90 seconds. But what about in a smokey fire? Know how many rows you are from an exit door. And as this simulation shows, get down and follow the light. Keep your chose on during landing and takeoff and the best advice from a former captain -- when the flight attendants say get on your feet and get out the airplane, you do it. Reporter: Don't forget, survival rates are 95%. The odds are on your side. Our thanks to david kerley.

This transcript has been automatically generated and may not be 100% accurate.

Now Playing: Tense Moments for Passengers on American Airlines and Spirit Airlines Flights

Now Playing: {{itm.title}}

{"id":19611500,"title":"Surviving a Plane Crash","duration":"2:03","description":"Lessons in plane safety, and what passengers need to do to stay safe onboard a plane.","url":"/WNT/video/surviving-plane-crash-19611500","section":"WNT","mediaType":"Default"}